On the two-loop virtual QCD corrections to Higgs boson pair production in the standard model

被引：57
|
作者：
Degrassi, Giuseppe [1 ,2 ]
Giardino, Pier Paolo [1 ,3 ]
Grober, Ramona [2 ]
机构：
[1] Univ Rome Tre, Dipartimento Matemat & Fis, I-00146 Rome, Italy
[2] Ist Nazl Fis Nucl, Sez Roma Tre, I-00146 Rome, Italy
[3] Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA
来源：
EUROPEAN PHYSICAL JOURNAL C | 2016年 / 76卷 / 07期
基金：
美国能源部;
关键词：
B(B)OVER-BARB(B)OVER-BAR FINAL-STATE; COLLISIONS; DIAGRAMS; SEARCH; MASSES; NLO;
D O I：
10.1140/epjc/s10052-016-4256-9
中图分类号：
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号：
摘要：
We compute the next-to-leading order virtual QCD corrections to Higgs-pair production via gluon fusion. We present analytic results for the two-loop contributions to the spin-0 and spin-2 form factors in the amplitude. The reducible contributions, given by the double-triangle diagrams, are evaluated exactly while the two-loop irreducible diagrams are evaluated by an asymptotic expansion in heavy top-quark mass up to and including terms of O(1/m(t)(8)). Assuming that the finite top-quarkmass effects are of similar size in the entire range of partonic energies, we estimate that mass effects can reduce the hadronic cross section by at most 10 %.
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页数：13
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